636429 has 8 divisors (see below), whose sum is σ = 898560. Its totient is φ = 399296.

The previous prime is 636421. The next prime is 636469. The reversal of 636429 is 924636.

636429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 636429 - 2³ = 636421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 636396 and 636405.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636429.

It is not an unprimeable number, because it can be changed into a prime (636421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6189 + ... + 6290.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2⁶³⁶⁴²⁹ is an apocalyptic number.

It is an amenable number.

636429 is a deficient number, since it is larger than the sum of its proper divisors (262131).

636429 is a wasteful number, since it uses less digits than its factorization.

636429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12499.

The product of its digits is 7776, while the sum is 30.

The square root of 636429 is about 797.7650029927. The cubic root of 636429 is about 86.0168076037.

The spelling of 636429 in words is "six hundred thirty-six thousand, four hundred twenty-nine".